{"id":23275,"date":"2024-06-01T10:56:13","date_gmt":"2024-06-01T06:26:13","guid":{"rendered":"https:\/\/broudat-kar.com\/lang\/?p=23275"},"modified":"2025-08-30T12:45:30","modified_gmt":"2025-08-30T09:15:30","slug":"fish-cold-storage","status":"publish","type":"post","link":"https:\/\/broudat-kar.com\/lang\/en\/fish-cold-storage\/","title":{"rendered":"Fish Cold Storage"},"content":{"rendered":"\t\t
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Fish and Shrimp Cold Storage Systems – Preserving Freshness<\/strong><\/h1>

Fish and shrimp cold storage facilities play an important role in preserving the freshness of aquatic products from catch to consumption. These facilities slow down the spoilage process, which is primarily caused by protein denaturation, fat structure changes, and cell tissue moisture loss. The Food and Agriculture Organization of the United Nations (FAO) sets standards for storing frozen fish, considering factors such as species, product type (whole, filleted, or processed), and storage duration. Standard temperatures vary by country; for instance, England mandates -30 degrees Celsius, while Iran’s range is typically between -18 and -20 degrees Celsius, with lower temperatures recommended for longer storage periods.<\/p>

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In the middle east countries, various aquatic species are available, and proper conservation measures must be followed to maintain product quality and freshness, ultimately enhancing customer satisfaction.<\/p>

Health and Flavor, Sourced From The Heart of The Sea, Safeguarded in Fish Cold Storage<\/p><\/blockquote>

\u00a0<\/strong>Diverse Fish Species of Iran<\/strong><\/h2>

Iran boasts a rich array of fish and shellfish species, sourced from the Caspian Sea, inland waters, Persian Gulf, and Oman Sea. These aquatic resources serve as vital components of Iran’s food industry, offering a diverse range of options for consumption and cultivation.<\/p>

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Preserving Fish Freshness: The Vital Role of Fish Cold Storage<\/strong><\/h2>

Research indicates that fish sourced from tropical waters exhibit longer shelf lives compared to those from colder waters due to the presence of natural bacterial flora. Gram-negative mesophilic bacteria, which are more active in warmer conditions, dominate in tropical waters, while Gram-negative psychrophiles are the main culprits of fish spoilage. Upon entering cold storage, the transition of bacteria from mesophilic to psychrophilic states is slowed due to the low temperatures, extending the fish’s freshness and quality.<\/p>

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Preserving Freshness: Best Practices for Handling Freshly Caught Fish<\/strong><\/h2>

Effective handling of freshly caught aquatic animals is crucial to maintain their quality from the moment of capture. Below are essential care measures focusing on refrigeration processes:<\/p>

\u00a0On-Board Care<\/strong><\/h3>

Fish should be promptly processed after catch, with modern boats employing washing and icing methods for quick preservation. Crustaceans like lobsters are typically kept alive, while shrimps are stored in ice or low-temperature brine.<\/p>

\u00a0Icing<\/strong><\/h3>

Lowering storage temperature delays bacterial and enzymatic activities, slowing spoilage. Clean ice is crucial; using chlorinated or potable water is recommended for ice production. Flake ice makers<\/a><\/strong><\/span> are common on ships.<\/p>

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\u00a0Salt Water Icing<\/strong><\/h3>

Adding salt to water for ice production allows for lower temperatures close to the freezing point of fish. A 3% sodium chloride brine solution produces ice at about -1\u00b0C for storage.<\/p>

Before mechanical refrigeration, natural ice preserved the freshness of fish, a practice we continue today with modern expertise and dedication.<\/p><\/blockquote>

\u00a0Use of Preservatives<\/strong><\/h3>

The use of antibiotics in aquatic animals is prohibited and not recommended for any purpose.<\/p>

\u00a0Crating at Sea<\/strong><\/h3>

Boxing fish at sea reduces pressure, minimizing physical damage and increasing efficiency. Immediate boxing by size and species ensures uniformity and firmer texture, enhancing fillet quality.<\/p>

\u00a0Measures for On-Land Storage<\/strong><\/h3>

Upon reaching land, proper ice usage and adherence to sanitary practices are vital for continued freshness during processing, packaging, and distribution. Following health and quality protocols is essential for delivering high-quality fish to consumers.<\/p>

\u00a0Assessing Fish Quality: Visual Indicators of Freshness<\/strong><\/h2>

Visual assessment remains a primary method for gauging fish quality and freshness. While some regions increasingly rely on physical and chemical tests for accuracy, visual inspection remains valuable. Quality assessment based on appearance varies by species, with general guidelines available in fish quality tables.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t

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Fish quality appearance evaluation table<\/h2>\n
\n \n\n \n \n \n \n \n \n \n \n
\n Row <\/td>\n \n Factor <\/td>\n \n \n Good Quality\n <\/td>\n \n \n Poor Quality\n <\/td>\n <\/tr>\n
\n 1 <\/td>\n \n \n Eyes\n <\/td>\n \n \n Bright, transparent, often protruding\n <\/td>\n \n \n Cloudy, often pink, sunken\n <\/td>\n <\/tr>\n
\n 2 <\/td>\n \n \n Odor\n <\/td>\n \n \n Sweet, fishy, similar to seaweed\n <\/td>\n \n \n Stale, sour, presence of sulfides, amines\n <\/td>\n <\/tr>\n
\n 3 <\/td>\n \n \n Color\n <\/td>\n \n \n Bright, characteristic of species, sometimes\n pearlescent at correct light angles\n <\/td>\n \n \n Faded, dull\n <\/td>\n <\/tr>\n
\n 4 <\/td>\n \n \n Texture\n <\/td>\n \n \n Firm, may be in rigor, elastic to finger pressure\n <\/td>\n \n \n Soft, flabby, little resilience, presence of fluid\n <\/td>\n <\/tr>\n
\n 5 <\/td>\n \n Belly <\/td>\n \n \n Walls intact, vent pink, normal shape\n <\/td>\n \n \n Often ruptured, bloated, vent brown, protruding\n <\/td>\n <\/tr>\n
\n 6 <\/td>\n \n \n Organs (including gills)\n <\/td>\n \n \n Intact, bright, easily recognizable\n <\/td>\n \n \n Soft to liquid, gray homogeneous mass\n <\/td>\n <\/tr>\n
\n 7 <\/td>\n \n \n Muscle tissue\n <\/td>\n \n \n White or characteristic of species and type\n <\/td>\n \n \n White flesh pink to gray, spreading of blood color around backbone\n <\/td>\n <\/tr>\n <\/table>\n<\/div>